Webtail calls; a BPF program can tail-call another BPF program, which takes a memory access and an indirect jump. To make the matter worse, the overhead of BPF exten-sion chains increases with the increase of the length of the chain. We have seen real-world BPF use cases with long BPF extension chains. For example, systemd [26] installs 19 sec- WebYou have an example for tail calls available in samples/bpf/sockex3_kern.c. I noticed that it does not use the same section names for all programs, maybe the /1 /2 /3 added by the …
eBPF: from BPF to BPF Calls to Tail Calls - programs.team
Webint bpf_tail_call (void *ctx, struct bpf_map *prog_array_map, u32 index) Description This special helper is used to trigger a "tail call", or in other words, to jump into another eBPF program. The same stack frame is used (but values on stack and in registers for the caller are not accessible to the callee). WebGitHub - unicell/ebpf-examples: A collection of eBPF examples unicell / ebpf-examples main 2 branches 0 tags Code 8 commits Failed to load latest commit information. bpf … photogenerated carrier concentration
xdpcap: XDP Packet Capture - The Cloudflare Blog
WebNetdev Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH v7 bpf-next 0/7] bpf: tailcalls in BPF subprograms @ 2024-09-02 20:08 Maciej Fijalkowski 2024-09-02 20:08 ` [PATCH v7 bpf-next 1/7] bpf, x64: use %rcx instead of %rax for tail call retpolines Maciej Fijalkowski ` (6 more replies) 0 siblings, 7 replies; 15+ messages in thread From: Maciej … Weblong bpf_tail_call (void *ctx, struct bpf_map *prog_array_map, u32 index) Description This special helper is used to trigger a "tail call", or in other words, to jump into another eBPF program. The same stack frame is used (but values on stack and in registers for the caller are not accessible to the callee). WebI've also added the bpf_tail_call_static() helper to the libbpf API that we've been using in Cilium for a while now, and last but not least the series adds a few selftests. For details, please check individual patches, thanks! Daniel Borkmann (6): bpf: ... how does the sperm reach the egg